Fan



FIG. 1 is a perspective view taken from the top, front and right side of a fan showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is an elevational view taken from one side thereof, the opposite side being the same as the side shown;

FIG. 4 is a rear elevational view thereof; and

FIG. 5 is another side elevational view taken 90 degrees from the side shown in FIG. 3, the opposite side being the same as the side shown. 

The ornamental design for a fan, as shown and described. 